The basic principles of geomechanical processes occurring in mine workings during the extraction of minerals are discussed in this monograph. Particular attention is paid to the support system, specifically to the various roof-bolt and frame support designs, and also to the modern means providing resource-saving conditions for ensuring mine workings sustainability. The basic principles of the computing experiment performance at the modelling of geomechanical processes are also presented and the stress-strain state of "rock massif - mine working support" systems are investigated. Finally, the results of field studies are discussed and illustrated. Modern studies are presented in this work, the advanced support systems are introduced and the solution to the problem of low-cost rock pressure control in mine workings is described. Further the unique study in the thin-layer massif of weak rocks is conducted and the technical and economic aspects of mine workings maintenance during rocks heaving are described. The book will be of interest to scientists in research and design organizations in the mining sector, engineers and technological workers in mines, as well as university academics and students.

Radar scattering and imaging of rough surfaces is an active interdisciplinary area of research with many practical applications in fields such as mineral and resource exploration, ocean and physical oceanography, military and national defense, planetary exploration, city planning and land use, environmental science, and many more. By focusing on the most advanced analytical and numerical modeling and describing both forward and inverse modeling, Radar Scattering and Imaging of Rough Surfaces: Modeling and Applications with MATLAB (R) connects the scattering process to imaging techniques by vivid examples through numerical and experimental demonstrations and provides computer codes and practical uses. This book is unique in its simultaneous treatment of radar scattering and imaging. Key Features Bridges physical modeling with simulation for resolving radar imaging problems (the first comprehensive work to do so) Provides excellent basic and advanced information for microwave remote-sensing professionals in various fields of science and engineering Covers most advanced analytical and numerical modeling for both backscattering and bistatic scattering Includes MATLAB (R) codes useful not only for academics but also for radar engineers and scientists to develop tools applicable in different areas of earth studies Covering both the theoretical and the practical, Radar Scattering and Imaging of Rough Surfaces: Modeling and Applications with MATLAB (R) is an invaluable resource for professionals and students using remote sensing to study and explain the Earth and its processes. University and research institutes, electrical and radar engineers, remote-sensing image users, application software developers, students, and academics alike will benefit from this book. The author, Kun-Shan Chen, is an internationally known and respected engineer and scientist and an expert in the field of electromagnetic modeling.

All the cost data you need to keep your estimating accurate, competitive and profitable.
Do you work on jobs between 50 and 50,000? - Then this book is for you.
Specially written for contractors and small businesses carrying out small works, Spon's Estimating Cost Guide to Plumbing and Heating contains accurate information on thousands of rates each broken down to labour, material overheads and profit.
The first book to include typical project costs for:

• rainwater goods installations
• bathrooms
• external waste systems
• central heating systems
• hot and cold water systems.

Chemo-Biological Systems for CO2 Utilization describes the most recent advanced tools and techniques for carbon dioxide capture and its utilization. It discusses and compares the advantages of different systems and aids researchers and industrialists in understanding energy generation in the form of biofuels, bioelectricity, or biogas using chemicals; nanomaterials; and microbial, enzymatic, and chemo-enzymatic-integrated systems. It describes the importance and utilization of CO2 in living systems, and provides an overview of the various fundamental methods, policies, and techniques involved in CO2 conversion. Emphasis is placed on the production of value-added products using CO2, including biomethanol, industrial carbonates, and liquid or gaseous fuels. Features: Explains the correlations between microbial, biological, and chemical products and their roles in the conversion of CO2 into usable energy and related products. Being suitable for a broad audience, it addresses fundamental treatment methods for reusing environmental waste materials. Aids in decision-making and policy planning for environmental professionals. The information provided throughout this book will help researchers and professionals working in various industries to better understand the conversion of CO2 into energy-based products. Chemo-Biological Systems for CO2 Utilization also serves as a useful guide to seek alternative methods for clean energy and mitigating global climate change.

Earthen levees are extensively used to protect the population and infrastructure from periodic floods and high water due to storm surges. The causes of failure of levees include overtopping, surface erosion, internal erosion, and slope instability. Overtopping may occur during periods of flooding due to insufficient freeboard. The most problematic situation involves the levee being overtopped by both surge and waves when the surge level exceeds the levee crest elevation with accompanying wave overtopping. Overtopping of levees produces fast-flowing, turbulent water velocities on the landward-side slope that can potentially damage the protective grass covering and expose the underlying soil to erosion. If overtopping continues long enough, the erosion may eventually result in loss of levee crest elevation and possibly breaching of the protective structure. Hence, protecting levees from erosion by surge overflow and wave overtopping is necessary to assure a viable and safe levee system. This book presents a cutting-edge approach to understanding overtopping hydraulics under negative free board of earthen levees, and to the study of levee reinforcing methods. Combining soil erosion test, full-scale laboratory overtopping hydraulics test, and numerical modeling for the turbulent overtopping hydraulics. It provides an analysis that integrates the mechanical and hydraulic processes governing levee overtopping occurrences and engineering approaches to reinforce overtopped levees. Topics covered: surge overflow, wave overtopping and their combination, full-scale hydraulic tests, erosion tests, overtopping hydraulics, overtopping discharge, and turbulent analysis. This is an invaluable resource for graduate students and researchers working on levee design, water resource engineering, hydraulic engineering, and coastal engineering, and for professionals in the field of civil and environmental engineering, and natural hazard analysis.

The book presents engineering concepts, techniques, practices, principles, standard procedures, and models that are applied and used to design and evaluate traffic systems, road pavement structures, alternatives of transportation systems, roadway horizontal and vertical alignments to ultimately achieve safety, sustainability, efficiency, and cost-effectiveness. The book provides plentiful number of problems on five major areas of transportation engineering and includes broad range of ideas and practical problems that are included in all topics of the book. Furthermore, the book covers problems dealing with theory, concepts, practice, and applications. The solution of each problem in the book follows a step-by-step procedure that includes the theory and the derivation of the formulas in some cases and the computations. Moreover, almost all problems in the five parts of the book include detailed calculations that are solved using the MS Excel worksheets where mathematical, trigonometric, statistical, and logical formulas are used to obtain a more rapid and efficient solution. In some cases, the MS Excel solver tool is used for solving complex equations in several problems of the book. Additionally, numerical methods, linear algebraic methods, and least squares regression techniques are utilized in some problems to assist in solving the problem and make the solution much easier. The book will help academics and professionals to find practical solutions across the spectrum of transportation engineering. The book is designed to be informative and filled with an abundance of solutions to problems in the engineering science of transportation. It is expected that the book will enrich the knowledge and science in transportation engineering, thereby elevating the civil engineering profession in general and the transportation engineering practice in particular as well as advancing the transportation engineering field to the best levels possible. FEATURES: Presents coverage of five major areas in transportation engineering: traffic engineering, pavement materials, analysis, and design, urban transportation planning, highway surveying, and geometric design of highways. Provides solutions to numerous practical problems in transportation engineering including terminology, theory, practice, computation, and design. Includes downloadable and user-friendly MS Excel spreadsheets as well as numerical methods and optimization tools and techniques. Includes several practical case studies throughout. Implements a unique kind of approach in presenting the different topics.

The public has a great desire for products that prevent the annoyance of biting insects and ticks, but that desire does not always translate into sensible use of those products. Insect Repellents Handbook, Second Edition summarizes evidence-based information on insect repellents to inform decisions by those involved with insect repellent research, development, and use. This authoritative, single-source reference makes it possible for you to quickly gain a working level of expertise about insect repellents, without having to search through the scattered literature. The previous edition was the first comprehensive volume on this subject and quickly became the definitive reference on insect repellents. This second edition reflects the current state of insect repellent science, covers the processes involved in the development and testing of new active ingredients and formulations, and discusses the practical uses of repellents. The book includes thought-provoking discussions on how repellents work, their neuromolecular basis of action, and whether green chemistry can provide effective repellents. It also supplies an in-depth understanding of the development of repellents including testing methods, review of active ingredients, and the use of chemical mixtures as repellents. It provides science-backed chapters on repellent use including best practices for use of personal protection products, criteria for repellent use, and insect repellents for other potential use.

Traffic and Pavement Engineering presents the latest engineering concepts, techniques, practices, principles, standard procedures, and models that are applied and used to design and evaluate traffic systems, road pavement structures, and alternative transportation systems to ultimately achieve greater safety, sustainability, efficiency, and cost-effectiveness. It provides in-depth coverage of the major areas of transportation engineering and includes a broad range of practical problems and solutions, related to theory, concepts, practice, and applications. Solutions for each problem follow step-by-step procedures that include the theory and the derivation of the formulas and computations where applicable. Additionally, numerical methods, linear algebraic methods, and least squares regression techniques are presented to assist in problem solving. Features: Presents coverage of major areas in transportation engineering: traffic engineering, and pavement materials, analysis, and design. Provides solutions to numerous practical problems in traffic and pavement engineering including terminology, theory, practice, computation, and design. Offers downloadable and user-friendly MS Excel spreadsheets as well as numerical methods and optimization tools and techniques. Includes several practical case studies throughout. Utilizes a unique approach in presenting the different topics of transportation engineering. Traffic and Pavement Engineering will help academics and professionals alike to find practical solutions across the broad spectrum of traffic and pavement engineering issues.

Ecotechnologies for wastewater treatment (EWWT) have been used as a cost-effective alternative to conventional wastewater treatment methods for improving the removal of organic carbon, nutrients and pathogenic microorganisms from wastewater. However, due to biochemical transformations of organic matter and nutrients EWWT are net sources of CO2, CH4 and N2O greenhouse gases (GHGs), which may be transferred into the atmosphere contributing to global warming. Greenhouse Gas Emissions from Ecotechnologies for Wastewater Treatment provides scientific information about greenhouse gas, such as CO2, CH4 and N2O, generation and emissions from different municipal EWWT. The main EWWT considered in this book are anaerobic ponds, facultative ponds, duckweed-based ponds, and a freshwater natural wetland perturbed by anthropogenic activities such as wastewater discharge and nutrients from agricultural run-off. The book includes a full literature review of recent publications about GHGs emissions from EWWT. It also introduces the calculation of GHGs flux using a static chamber technique. Besides, the book presents information on the influence of environmental factors such as temperature, pH, DO, and nutrients on GHG emissions produced in EWWT under tropical conditions. This book will be a useful reference for researches and students interested in the broader area of water and climate change subjects. The publication may also be of interest to policy makers concerned with climate change, water sector planning, and wastewater treatment.

Demolishing and rebuilding is becoming less and less of an option, and developing trends such as the growth of PFI are directing attention to whole life costing. With the relentless drive towards greater sustainability, proper asset management of the existing infrastructure will become increasingly important in the future. This authoritative book draws together deterioration and repair/remediation with practical asset management. Despite the wealth of information there is a lack of clear guidance on how to carry out a practical assessment of concrete structures and manage repair in the field. Accordingly, this book gives solid practical guidance on assessment, and outlines when and how to act. The focus is on engineering aspects and decision-making, in terms of perspective, procedures and principles, while giving references for matters of detail such as test methods and the mechanisms of deterioration. It links deterioration to deficiencies in design, detailing, materials and construction quality. It then gives examples of how asset management systems have evolved for different types of structure in different countries. It shows how to move forward from inspection and diagnosis, through different methods of damage or structural assessment, to the selection of the optimum method of repair or remedial action. The concept of progressive screening is proposed - that is, only going as far as is necessary to reach a decision with confidence. The author has drawn on over thirty years experience on concrete durability and, in particular, on his involvement in three recent European-funded projects, involving collaboration between the owners of structures and researchers.

The Handbook of Irrigation System Selection for Semi-Arid Regions compares the various types of available irrigation systems for different regions and conditions, and explains how to analyze field data to determine the suitability of the land for surface, sprinkle, or drip irrigation systems. The book focuses on strategies for irrigation development and management and examines deficit irrigation and partial root-zone drying systems. Also, solute leaching modeling under different irrigation systems, soil moisture conditions, and organic fertilizer application in arid areas are discussed. Further, it examines multi-criteria decision making for irrigation management and the appraisal of agricultural lands for irrigation in hot, sub-humid regions. Features: Presents comparative analysis to aid in the selection of the most appropriate types of irrigation systems according to land characteristics. Includes numerous practical case studies. Offers parametric evaluation systems for irrigation purposes. Considers data from semi-arid zones, each with different sub-climates. Focusing on semi-arid land, the book highlights parametric evaluation systems for irrigation purposes, along with the use of analytical hierarchy processes integrated with GIS to determine which systems are best suited. This comprehensive and well-illustrated handbook will be of great interest to students, professionals, and researchers involved with all aspects of irrigation in semi-arid regions.

Practice management for Land, Construction and Property Professionals presents the expert views and practical experience of researchers and practitioners concerned with the particular challenges and skills required to manage professional service organizations in the constuction and property industries. The book provides extensive coverage of the following key issues: management of creativity marketing of professional services professional ethics quality management business planning and strategic management Practice management for land, Construction and Property Professionals will be an important guide for those with management responsibiliie in the property and construction industries. Students working towards qualifications in the properrty and construction professions will also find the book a valuable reference and source of advice.

Issues in Underground Storage Tank Management presents a comprehensive description of the many complex facets of hazardous waste management, tank closure, and site assessment. It is also the only book to cover financial assurance of UST remediation. Part I discusses UST closure including regulation, closure techniques, site assessment methods and data interpretation, waste disposal, contracting, and health and safety. The book's site assessment section covers such issues as field screening, analytical techniques, sample collection, and equipment decontamination. Part 2 covers financial assurance addressing UST financial responsibility, EPA financial responsibility regulations, use of insurance, use of state funds, and litigation and common law. Non-technical language is used throughout the book to present information in an easy-to-understand, readable fashion. Issues in Underground Storage Tank Management is an essential guide for UST owners, facility managers, environmental and hazardous waste consultants, federal and state environmental regulatory personnel, groundwater professionals, pollution engineers. It also has useful information for anyone involved in petroleum contamination assessment.

This book provides a comprehensive and updated insight into dielectric elastomers; one of the most promising classes of polymer-based smart materials and technologies. This technology can be used in a very broad range of applications, from robotics and automation to the biomedical field.
The need for improved transducer performance has resulted in considerable efforts towards the development of devices relying on materials with intrinsic transduction properties. These materials, often termed as "smart" or "intelligent," include improved piezoelectrics and magnetostrictive or shape-memory materials. Emerging electromechanical transduction technologies, based on so-called ElectroActive Polymers (EAP), have gained considerable attention. EAP offer the potential for performance exceeding other smart materials, while retaining the cost and versatility inherent to polymer materials. Within the EAP family, "dielectric elastomers," are of particular interest as they show good overall performance, simplicity of structure and robustness. Dielectric elastomer transducers are rapidly emerging as high-performance "pseudo-muscular" actuators, useful for different kinds of tasks. Further, in addition to actuation, dielectric elastomers have also been shown to offer unique possibilities for improved generator and sensing devices.
Dielectric elastomer transduction is enabling an enormous range of new applications that were precluded to any other EAP or smart-material technology until recently.
This book provides a comprehensive and updated insight into dielectric elastomer transduction, covering all its fundamental aspects. The book deals with transduction principles, basic materialsproperties, design of efficient device architectures, material and device modelling, along with applications.
* Concise and comprehensive treatment for practitioners and academics
* Guides the reader through the latest developments in electroactive-polymer-based technology
* Designed for ease of use with sections on fundamentals, materials, devices, models and applications

This book presents a unique and up-to-date summary of what is known about groundwater on our planet, from a global perspective and in terms of area-specific factual information. Unlike most textbooks on groundwater, it does not deal with theoretical principles, but rather with the overall picture that emerges as a result of countless observations, studies and other activities related to groundwater in all parts of the world. The focus is on showing the role and geographical diversity of groundwater-a natural resource of great importance in daily life, but poorly understood by the general public and even by many water sector professionals. The book starts by analysing groundwater in the context of the hydrological cycle. Subsequently, groundwater systems as physical units, with their boundaries mainly defined by geological conditions, are reviewed. The next chapter looks at groundwater as a resource, paying attention, among others, to its quantity and quality, to the differentiation between renewable and non-renewable resources, and to the techniques for withdrawing groundwater. This is followed by a systematic documentation of the quantities of groundwater withdrawn and used around the world, and of the corresponding shares of groundwater in each of the main water use sectors. After that, steadily growing needs for groundwater management interventions are identified, resulting from local human activities and global change (including demography, economic development and climate change). Finally, groundwater resources management is addressed and real-life cases are described that illustrate actions taken and experiences with different issues in different parts of the world. The authors attempted to write this book in such a way that it is accessible to a wider readership than just groundwater professionals. It will also benefit non-groundwater specialists who work in groundwater-related fields (water managers, land use planners, environmentalists, agronomists, engineers, economists, lawyers, and journalists), by broadening their understanding of groundwater and making them aware of the huge variety of groundwater settings. Groundwater specialists will use the book as a convenient reference on the geographical diversity of groundwater. Part of the contents or interpretations offered may even be new to them or enhance their knowledge of some aspects. The many maps, tables, and references will save much time for those who would otherwise have to search elsewhere for basic information on the globe's groundwater.

This comprehensive reference guide to ventilation systems provides up-to-date knowledge based on the experience of internationally-recognized experts to deal with current and future ventilation requirements in buildings. Presenting the most recent developments in ventilation research and its applications, this book covers the fundamentals as well as more advanced topics. With rigorous coverage for researchers and a practical edge for building professionals, Ventilation Systems is the one stop guide for the subject.

Smith's Elements of Soil Mechanics The revised 10th edition of the core textbook on soil mechanics The revised and updated edition of Smith's Elements of Soil Mechanics continues to offer a core undergraduate textbook on soil mechanics. The author, a noted expert in geotechnical engineering, reviews all aspects of soil mechanics and provides a detailed explanation of how to use both the current and the next versions of Eurocode 7 for geotechnical design. Comprehensive in scope, the book includes accessible explanations, helpful illustrations, and worked examples and covers a wide range of topics including slope stability, retaining walls and shallow and deep foundations. The text is updated throughout to include additional material and more worked examples that clearly illustrate the processes for performing testing and design to the new European standards. In addition, the book's accessible format provides the information needed to understand how to use the first and second generations of Eurocode 7 for geotechnical design. The second generation of this key design code has seen a major revision and the author explains the new methodology well, and has provided many worked examples to illustrate the design procedures. The new edition also contains a new chapter on constitutive modeling in geomechanics and updated information on the strength of soils, highway design and laboratory and field testing. This important text: Includes updated content throughout with a new chapter on constitutive modeling Provides explanation on geotechnical design to the new version of Eurocode 7 Presents enhanced information on laboratory and field testing and the new approach to pavement foundation design Provides learning outcomes, real-life examples, and self-learning exercises within each chapter Offers a companion website with downloadable video tutorials, animations, spreadsheets and additional teaching materials Written for students of civil engineering and geotechnical engineering, Smith's Elements of Soil Mechanics, 10th Edition covers the fundamental changes in the ethos of geotechnical design advocated in the Eurocode 7.

First Published in 1999: The Bridge Engineering Handbook is a unique, comprehensive, and state-of-the-art reference work and resource book covering the major areas of bridge engineering with the theme "bridge to the 21st century."

This is the first volume of a two-volume guide to designing, conducting and interpreting laboratory and field experiments in a broad range of topics associated with hydraulic engineering. Specific guidance is provided on methods and instruments currently used in experimental hydraulics, with emphasis on new and emerging measurement technologies and methods of analysis. Additionally, this book offers a concise outline of essential background theory, underscoring the intrinsic connection between theory and experiments. This book is much needed, as experimental hydraulicians have had to refer to guidance scattered in scientific papers or specialized monographs on essential aspects of laboratory and fieldwork practice. The book is the result of the first substantial effort in the community of hydraulic engineering to describe in one place all the components of experimental hydraulics. Included is the work of a team of more than 45 professional experimentalists, who explore innovative approaches to the vast array of experiments of differing complexity encountered by today's hydraulic engineer, from laboratory to field, from simple but well-conceived to complex and well-instrumented. The style of this book is intentionally succinct, making frequent use of convenient summaries, tables and examples to present information. All researchers, practitioners, and students conducting or evaluating experiments in hydraulics will find this book useful.

Constructed Wetlands for Water Quality Improvement is a virtual encyclopedia of state-of-the-art information on the use of constructed wetlands for improving water quality. Well-organized and easy-to-use, this book features contributions from prominent scientists and provides important case studies. It is ideal for anyone involved in the application of constructed wetlands in treating municipal and industrial wastewater, mine drainage, and non-point source pollution. Constructed Wetlands for Water Quality Improvement is a "must" for industrial and municipal water treatment professionals, consulting engineers, federal and state regulators, wetland scientists and professionals, ecologists, environmental health professionals, planners, and industrial environmental managers.

Groundbreaking and comprizing articles by expert contributors, this volume provides a comprehensive treatment of VLFSs and their relationship with the sea, marine habitats, the pollution of costal waters and tidal and natural current flow. It looks in-depth at: VLFS and the colonization of ocean space with their appearance in the waters off developed coastal cities wave properties, which is essential for estimating the loading on the VLFS as well as for modelling structure-fluid interactions hydroelastic and structural analysis of VLFS at an overall level and the cell level the analysis and design of breakwaters simulation models to understand the actual flow of water through the VLFS and to determine the drift forces for the mooring systems anti-corrosion and maintenance systems new research and developments, with emphasis on the Mega-Float, a 1 km long floating test runway. Well-illustrated with photographs, drawings, equations for mathematical modelling and analysis and extensively referenced, Very Large Floating Structures is ideal for professionals, academics and students of civil and structural engineering.

The proceedings of the CIB W65 Symposium on the Organization and Management of Construction conference are presented here and in the companion volumes as state-of-the-art papers documenting research and innovative practice in the field of construction. The volumes cover four broad themes: business management, project management, risk management, IT development and applications. Each volume is organized to provide easy reference so that the practitioner can speedily extract up to date information and knowledge about the global construction industry. Managing the Construction Enterprise (Volume One): Covers the firm and its business environment, markets and marketing, human resource management strategic planning, and quality management. Managing the Construction Project (Volume Two): focuses upon productivity, procurement, international projects and human issues in relation to management performance of construction organisations. Managing Risk (Volume Two): incorporates discussion of risk away from regulation by government and those safety risks inherent in the construction process. Managing Construction Information (Volume Three, published in conjunction with Construct IT Centre of Excellence): incorporates material on information systems and methods, application of IT to the design and construction processes and how IT theory and applications are best transmitted to students and practitioners. The work represents a collation of wide ranging ideas and theory about construction and how research has contributed to the development of the industry on a global application of research to the problems of the construction industry.

The proceedings of the CIB W65 Symposium on the Organization and Management of Construction conference are presented here and in the companion volumes as state-of-the-art papers documenting research and innovative practice in the field of construction. The volumes cover four broad themes: business management, project management, risk management, IT development and applications. Each volume is organized to provide easy reference so that the practitioner can speedily extract up to date information and knowledge about the global construction industry. Managing the Construction Enterprise (Volume One): Covers the firm and its business environment, markets and marketing, human resource management strategic planning, and quality management. Managing the Construction Project (Volume Two): focuses upon productivity, procurement, international projects and human issues in relation to management performance of construction organisations. Managing Risk (Volume Two): incorporates discussion of risk away from regulation by government and those safety risks inherent in the construction process. Managing Construction Information (Volume Three, published in conjunction with Construct IT Centre of Excellence): incorporates material on information systems and methods, application of IT to the design and construction processes and how IT theory and applications are best transmitted to students and practitioners. The work represents a collation of wide ranging ideas and theory about construction and how research has contributed to the development of the industry on a global application of research to the problems of the construction industry.

At the present time, 430 drugs are known to cause respiratory injury. This represents an increase of almost 200 in the last ten years, and the number is still increasing. This comprehensive, definitive reference work, with an outstanding range of international expert contributors and two of the world's leading editors, provides an essential reference for the practising respiratory physician. Key features: The text builds upon basics with a review of basic sciences. The book covers imaging, varied drug-induced interstitial lung disease including pulmonary edema and diffuse alveolar hemorrhage, acute respiratory failure, pleural involvement and upper to lower airway disease A wide range of diseases are detailed from chemotherapy and radiation to biologic-induced lung disease, drug misuse, and special groups such as recipients of stem cell and solid organ transplants. A range of world class contributions from key opinion leaders. This book provides essential information for recognizing and managing drug-induced respiratory disease for all pulmonologists and respiratory care physicians. It will be of great interest to: critical care medicine specialists, hematologists, oncologists, cardiologists, allergists, rheumatologists, neurologists, internists, blood-bank specialists, pathologists and primary care physicians.

There is a growing need for environmental measurement personnel who possess a solid understanding of the techniques of air pollutant sampling. This essential book explains the fundamentals of air sampling, develops the theory of gas measurement, and presents several "how-to" examples of calibration and use of air and gas sampling devices. Other topics covered range from the basics of pressure measurement and units conversion to specific discussions regarding the use of a Volatile Organic Sampling Train or a SUMMA-polished canister sampling system.